TW201435851A - Display device, method for driving same, and electronic apparatus - Google Patents

Abstract

A display device is provided with a display element for displaying an image on a screen, and a driving means for driving the display element such that a scanning mode for scanning and a pause mode in which the scanning is paused are alternately repeated. The driving means transmits a pause drive control signal to the display element and drives the display element such that one screen is scanned by performing the scanning mode twice and the pause mode twice. The driving means outputs to a touch panel during the pause mode a detection instruction signal instructing to detect.

Description

Electronic machine and its timing control method

The present invention relates to a display device, a driving method thereof, and an electronic device. The display device includes a display element for displaying an image on a screen, and is driven in a scanning mode in which scanning is alternately repeated, and a pause mode in which the scanning is stopped. The driving mechanism of the aforementioned display element.

In recent years, thin, lightweight, and low power consumption display devices represented by liquid crystal display devices have been actively applied. Such a display device is remarkable for use in, for example, a mobile phone, a smart phone, a laptop PC (personal computer), or the like. In addition, development and popularization of electronic paper, which is a thinner display device, is expected to develop rapidly. In such a situation, the common problem with various display devices at present is to reduce power consumption.

Patent Document 1 discloses a driving method of a display device that realizes a low power consumption by providing a non-scanning time that is longer than a scanning time of scanning a screen, that is, a rest time in which the full scanning signal line is in a non-scanning state.

Further, the touch panel provided on the display screen of the display device is also actively used (for example, Patent Document 2). The touch panel is a position input device that detects a position on the display screen that is instructed by a user's finger, a pen, or the like (hereinafter referred to as "finger or the like"), and outputs the detected position information. Since the touch panel can perform an intuitive operation as compared with an input device such as a keyboard or a mouse, it is significantly used for, for example, a mobile phone. Smart phones, laptop PCs, etc.

[Previous Technical Literature]

[Patent Literature]

[Patent Document 1] Japanese Laid-Open Patent Publication No. 2001-312253 (published on November 9, 2001)

[Patent Document 2] Japanese Laid-Open Patent Publication No. 2001-060079 (published on March 6, 2001)

The detection operation of the touch panel causes a decrease in the SN ratio (signal-to-noise ratio) due to the influence of the driving signal of the display device, and deteriorates the detection accuracy. On the other hand, the influence of the drive signal of the display device is significantly smaller during the non-scanning period in which the scanning is not performed, and during the scanning period during which the scanning of the display is performed. Therefore, it is conceivable to perform the operation of detecting the touch panel during the non-scanning period of the display device.

Fig. 12 is a timing chart showing temporal changes in the operating state of the previous display device. As shown in FIG. 12, in the prior display device, the 1-frame period (1/60 ≒ 16.6 ms) was mostly the scanning period, and the non-scanning period was significantly shorter than the 100 μs level.

On the other hand, Fig. 13 is a timing chart showing the operation state of the display device of Patent Document 1 and the temporal changes of various signals. As shown in FIG. 13, in the display device of Patent Document 1, since the scanning period is shortened in one frame period, the non-scanning period is extended. Thereby, the non-scanning period is longer than the detection period required for the detection operation of the touch panel, and the detection can be expected to be performed during the non-scanning period.

However, it is said that it is necessary to automatically recognize the symbol of a character or the like input by the user by handwriting on the touch panel, and the so-called "handwriting input" function, the touch panel must perform the handwriting detection operation for about 100 times in one second. That is, the detection operation frequency of the above-described detection operation of the touch panel must be about 100 Hz or more.

However, in general, the display device displays 60 images of one screen in one second, that is, the update frequency is 60 Hz. Therefore, the non-scanning period is only 60 times in one second, and as a result, it is difficult to perform the handwriting detection operation in the non-scanning period.

The present invention has been made in view of the above problems, and an object thereof is to provide a display device or the like which can increase the number of detection operations of an external detecting device and can improve the accuracy of the above-described detection result.

A display device according to the present invention is characterized in that it is provided with a display element for displaying an image on a screen, and a driving mechanism for driving the display element such that a scanning mode in which scanning is alternately repeated and a pause mode in which the scanning is stopped is performed. In order to achieve the above object, the driving mechanism can drive the display element by scanning one screen by using a plurality of scanning modes and a plurality of pause modes, and outputting the detection of the indication detection to the external detecting device in the suspension mode. Indication signal.

Further, the driving method of the display device of the present invention is characterized in that the display element for displaying an image on the screen is driven by a scanning mode in which scanning is alternately repeated, and a mode in which the scanning is stopped. The driving method is to drive the display element by scanning one screen by using a plurality of scanning modes and a plurality of pause modes, and outputting a detection instruction signal indicating the detection to the external detecting device in the suspension mode. .

According to the above configuration and method, one screen scan can be performed by the plurality of scan modes and the plurality of pause modes. Therefore, the number of times of the above-described rest mode can be increased as compared with the previous display device which performs scanning of one screen by one scanning mode and one pause mode.

Further, in the above-described rest mode, the detecting device performs an operation of detecting by outputting the detection instruction signal to the external detecting device. Thereby, the aforementioned detecting means can improve the accuracy of the result of the aforementioned detection. Also, as described above, since the aforementioned rest mode can be increased The number of times can increase the number of detection actions described above. As a result, for example, it can correspond to the aforementioned handwriting input.

As described above, since the display device of the present invention can scan one screen by using a plurality of scanning modes and a plurality of pause modes, the number of pause modes can be increased compared with the previous display device. In the above-described rest mode, since the detection instruction signal is output to the external detection device, the number of detection operations of the detection device can be increased, and the effect of improving the accuracy of the detection result can be exhibited.

1‧‧‧Electronic machines

1'‧‧‧Electronic machines

2‧‧‧Display device

2a‧‧‧Display panel (display component)

3‧‧‧Touch panel

4‧‧‧Scan line driver circuit (drive mechanism)

5‧‧‧Signal line drive circuit (drive mechanism)

6‧‧‧Common electrode drive circuit

7‧‧‧Sequence controller (drive mechanism)

8‧‧‧Detection Department

9‧‧‧Control Department

10‧‧‧ body device

70‧‧‧Normal scanning timing generation circuit (usually scanning drive mechanism)

71‧‧‧Multiple scanning timing generation circuit (multiple scanning drive mechanism)

72‧‧‧Selection Department (Selection Agency)

G‧‧‧ scan signal line

G1~G6‧‧‧ upper scanning signal line

G7~G12‧‧‧ scanning signal line in the middle

G13~G18‧‧‧ scanning signal line below

S‧‧‧ data signal line

S1~S8‧‧‧ data signal line

Fig. 1 is a timing chart showing an operation state of a display device of an electronic device according to an embodiment of the present invention and a temporal change of various signals.

Fig. 2 is a timing chart showing an example of a control signal of the scanning line driving circuit and an output signal from the scanning line driving circuit in the sleep mode of the display device.

3(a) to 3(c) are timing charts showing an example of a detection instruction signal outputted by the display device and a detection time of the touch panel of the electronic device.

Fig. 4 is a timing chart showing an operation state of a display device of an electronic device according to another embodiment of the present invention and a temporal change of various signals.

Fig. 5 is a timing chart showing an operation state of a display device for an electronic device and a time change of various signals according to still another embodiment of the present invention.

Fig. 6 is a timing chart showing an operation state of a display device of an electronic device and a time change of various signals according to still another embodiment of the present invention.

Fig. 7 is a block diagram showing a schematic configuration of a timing controller of a display device for an electronic device according to another embodiment of the present invention.

Fig. 8 is a timing chart showing the operation state of the display device and the time variation of various signals.

Figure 9 is a block diagram showing the details of the construction of the above electronic machine.

Fig. 10 is a block diagram showing the details of the constitution of a variation of the above electronic machine.

Fig. 11 is a timing chart showing a driving method of a display device in consideration of a delay time.

Fig. 12 is a timing chart showing temporal changes in the operating state of the previous display device.

Fig. 13 is a timing chart showing the operation state of other display devices and the temporal changes of various signals.

FIGS. 14(a) and 14(b) are diagrams showing an example of a configuration of a display panel of the display device, and showing an example of source inversion and frame inversion.

15(a) and 15(b) are structural diagrams showing another example of the configuration of the display panel, and show other examples of source inversion and frame inversion.

16(a) and 16(b) are structural diagrams showing an example of the configuration of the display panel, and showing an example of the reverse polarity and the frame inversion.

17(a) and 17(b) are diagrams showing an example of the configuration of the display panel, and showing an example of dot inversion and frame inversion.

Fig. 18 is an explanatory view showing a configuration of a modification of the display device.

Fig. 19 is a graph showing the characteristics of various TFTs.

[Embodiment 1]

An embodiment of the present invention will be described with reference to Figs. 1 to 3, Fig. 9, and Fig. 19.

(Composition of electronic machine 1)

First, the configuration of the electronic device 1 of the present embodiment will be described with reference to Fig. 9 . Fig. 9 is a block diagram showing the details of the configuration of the electronic device 1 of the embodiment. As shown in FIG. 9, the electronic device 1 includes a display device 2, a touch panel 3, and a body device 10. In the electronic device 1 of the present embodiment, the main body device 10 displays an output image via the display device 2, acquires an instruction from the user via the touch panel 3, and performs various processes based on the acquired instruction. Further, in addition to the image, any information such as a still image or a symbol may be outputted via the display device 2.

The display device 2 includes a display panel (display element) 2a, a scanning line driving circuit (gate driver, driving mechanism) 4, a signal line driving circuit (source driver, driving mechanism) 5, a common electrode driving circuit 6, and a timing controller (Drive mechanism) 7. Further, the touch panel 3 includes a detecting unit 8 and a control unit 9.

The display panel 2a is provided with a screen including a plurality of pixels arranged in a matrix. Further, the display panel 2a is provided with scanning signal lines G (gate lines) for scanning N (N is an arbitrary integer) of the above-described screens in line order. Further, the display panel 2a is provided with M (M is an arbitrary integer) data signal line S (source line) for supplying a data signal to one of the pixels included in the selected line. The scanning signal line G and the data signal line S cross each other.

G(n) shown in FIG. 9 indicates the scanning signal line G of the nth (n is an integer of 1 or more and N or less). For example, G(1), G(2), and G(3) indicate the first, second, and third scanning signal lines S, respectively. On the other hand, S(i) represents the data signal line S of the i-th (i is an integer of 1 or more and M or less). For example, S(1), S(2), and S(3) respectively indicate the first, second, and third data signal lines S.

The scanning line driving circuit 4 sequentially scans each scanning signal line G, for example, from the top of the screen. At this time, a rectangular wave for turning on the switching element provided in the pixel and connected to the pixel electrode is output to each scanning signal line G. Thereby, one column of pixels in the screen is selected.

However, the scanning of the scanning line driving circuit 4 is not limited to the above-described sequential scanning. For example, after scanning the first, third, fifth, ... odd-numbered scanning signal lines, scanning the second, fourth, and sixth... even-numbered scanning signal lines. scanning.

The signal line drive circuit 5 calculates a voltage value to be output to each pixel of the selected one column based on the image signal (arrow A) input from the main body device 10 via the timing controller 7, and outputs the voltage of the value to each data. Signal line S. As a result, image data is supplied to each pixel located on the selected scanning signal line G.

The display device 2 is provided with a common electrode provided for each pixel in the screen (not shown) Show). The common electrode driving circuit 6 outputs a specific common voltage (arrow C) for driving the common electrode to the common electrode based on the signal (arrow B) input from the timing controller 7.

The timing controller 7 is based on a clock signal, a horizontal synchronizing signal, and a vertical synchronizing signal (arrow D, clock signal, and video synchronizing signal) input from the main unit 10, and outputs each circuit as a synchronous operation for each circuit. The signal of the benchmark. Specifically, the scanning line driving circuit 4 outputs a gate start pulse signal, a gate clock signal, and a gate output enable signal (arrow E) based on the vertical synchronization signal. The signal line drive circuit 5 outputs a source start pulse signal, a source latch strobe signal, and a source clock signal (arrow F) based on the horizontal synchronizing signal.

The scan line driving circuit 4 starts the scanning of the display panel 2a with the gate start pulse signal received by the timing controller 7, and scans each of the scans according to the gate clock signal which converts the selected state of the scanning signal line G. The signal line G sequentially applies a selection voltage. The signal line drive circuit 5 stores the image data of each of the input pixels in the register based on the source clock signal based on the source start pulse signal received by the timing controller 7. Further, after the signal line drive circuit 5 stores the image data, the image data is written to the respective data signal lines S of the display panel 2a based on the next source latch strobe signal. The writing of the image data uses, for example, an analog amplifier of the signal line driving circuit 5.

In the touch panel 3, the detecting unit 8 is provided on the screen of the display panel 2a of the display device 2, and detects the position on the screen indicated by the user's finger or the like, and the control unit 9 controls the detecting unit 8 . Specifically, when the control unit 9 drives the detection unit 8 via the drive line Tx, the detection unit 8 detects the position and transmits a detection signal to the control unit 9 via the detection line Sx. The control unit 9 creates detection data (arrow I) indicating the detected position based on the detection signal from the detecting unit 8, and transmits it to the main body device 10.

In the present embodiment, the touch panel 3 of the projection type electrostatic capacitance type is used. In the case of the projection type capacitive touch panel 3, the detecting portion 8 is formed of a ITO (Indium Tin Oxide) or the like on a transparent substrate such as glass or plastic. A pattern of transparent electrode patterns. When the user's finger or the like comes into contact with or approaches the detecting portion 8, the electrostatic capacitance of the plurality of transparent electrode patterns in the vicinity thereof changes. Therefore, the control unit 9 can detect the position at which the user's finger or the like contacts or approaches by detecting a change in the current or voltage of the transparent electrode pattern.

Furthermore, the touch panel 3 also detects that the user's finger or the like is in contact with or close to any position on the screen. In this case, as long as the above contact or proximity is detected, it is not necessary to detect the above position.

The main unit 10 recognizes the user's operation based on the detection data from the touch panel 3, or transmits a video signal and a video synchronization signal to the display device 2 and the like for controlling the display of the display device 2.

Further, the voltage required to operate the respective circuits in the electronic device 1 is supplied from, for example, a power generation circuit (not shown), but the power generation circuit may be included in the main device 10. In this case, each voltage is supplied from the main body device 10 to the display device 2, and each voltage is supplied from the main body device 10 to the touch panel 3. As an example of a voltage required to operate each circuit in the electronic device 1, a power supply voltage Vdd is supplied to the signal line drive circuit 5.

In the following description, the scanning line driving circuit 4 and the signal line driving circuit 5 are collectively referred to as "driving circuits 4 and 5".

In the present embodiment, the timing controller 7 outputs a sleep drive control signal (arrow G) that controls the drive and the stop signals of the drive circuits 4 and 5 to the drive circuits 4 and 5.

Specifically, the timing controller 7 outputs a sleep drive control signal indicating the above-described driving to the drive circuits 4, 5 in the case of performing the scanning scan mode. Thereby, the drive circuits 4 and 5 drive the display panel 2a so as to perform scanning of the display.

On the other hand, when the timing controller 7 stops the pause mode of the scanning, the sleep control signal for instructing the above-described pause is output to the drive circuits 4 and 5, whereby the drive circuits 4 and 5 stop scanning the display. The timing controller 7 alternately repeats the above-described scanning mode and the above-described rest mode.

Further, in the case of the above-described rest mode, the timing controller 7 outputs a detection instruction signal (arrow H) indicating a detection operation in the touch panel 3 to the control unit 9 of the touch panel 3. In the touch panel 3, when the control unit 9 receives the detection instruction signal from the timing controller 7 of the display device 2, the detection unit 8 performs a detection operation, and the control unit 9 outputs the detection data indicating the detection result to the main body device. 10.

Further, in the present embodiment, the timing controller 7 outputs the above-described sleep drive control signal to the drive circuits 4 and 5 so as to scan one screen by the second scan mode and the second pause mode.

Fig. 1 is a timing chart showing the operation state of the display device 2 of the present embodiment and the temporal changes of various signals. In FIG. 1, a vertical synchronizing signal, an operation mode, a sleep drive control signal, and a scan signal output to each scanning signal line G are sequentially displayed from above.

Further, in the present embodiment and the following embodiments, the rest drive control signal is the same as the detection instruction signal, but the present invention is not limited thereto. For example, the phase of the sleep drive control signal and the detection instruction signal may be reversed, or the change of the indication signal may be started after the sleep drive control signal enters the sleep mode. That is, the timing at which the detection operation is started can be made later than the timing at which the pause mode is set. Moreover, for the sake of simplicity, the number of scanning signal lines G is set to 18, but the number is not limited thereto.

Referring to Fig. 1, first, a falling pulse of a vertical synchronizing signal is input, and scanning of one screen is started, and the transition to the first scanning mode is started. At this time, the sleep drive control signal is set to the L (low) level, and the scanning signal lines G1 to G9 are sequentially driven to scan the upper half of the screen. Furthermore, since the detection instruction signal is at the L (low) level, the touch panel 3 is stopped from detecting.

Second, move to the first rest mode. At this time, the rest drive control signal is set to the H (high) level, and the above scanning is stopped. At the same time, the detection operation is performed on the touch panel 3 by setting the detection instruction signal to H (high).

Next, the process shifts to the second scan mode. At this time, let the rest drive control signal be L bit Precisely, the remaining scanning signal lines G10 to G18 are sequentially driven, and the lower half of the screen is scanned to complete the scanning of one screen. Furthermore, since the detection instruction signal is at the L level, the touch panel 3 is stopped from detecting.

Second, move to the second dormant mode. At this time, the rest drive control signal is set to the H level, and the above scanning is stopped. At the same time, the detection operation is performed on the touch panel 3 by setting the detection instruction signal to the H level. Thereafter, the falling pulse of the vertical synchronizing signal is input again, and the above operation is repeated.

Comparing Fig. 1 with the previous example Fig. 13, it can be understood that in the present embodiment, the number of pause modes (resting periods) in one frame period is multiplied from one previous time to two times in the previous example. Usually, since the one frame period is 60 times per second, the number of pause modes in one second is increased to 2 × 60 = 120 times.

Further, in the sleep mode in which the influence of the drive signal is small, the touch panel 3 performs the detection operation. Therefore, the accuracy of the detection result can be improved. Further, the above detection can be performed 120 times in 1 second. As a result, for example, it can correspond to a handwriting input.

Further, in the present embodiment, as the switching element of each pixel of the display panel 2a, a TFT (Thin Film Transistor) of a so-called oxide semiconductor is used for the semiconductor layer. The above oxide semiconductor contains, for example, IGZO (InGaZnOx). The advantages of this configuration will be described with reference to FIG.

Fig. 19 is a graph showing the characteristics of various TFTs. Fig. 19 shows various characteristics of a TFT using an oxide semiconductor, a TFT using a-Si (amorphous silicon), and a TFT using LTPS (Low Temperature Poly Silicon). In the drawing, the horizontal axis represents the gate voltage Vgh, and the vertical axis represents the drain current Id.

As shown in FIG. 19, in the case where the gate voltage Vgh is equal to or less than a certain threshold value Vgh (TFT-off), the drain current Id is in a small and substantially constant off state. Next, when the gate voltage Vgh rises above the threshold value Vgh (TFT-off), the drain current Id rises. On the other hand, if the gate voltage Vgh further rises above the other threshold value Vgh (TFT-on), the drain current Id is in a large and substantially constant conduction state.

Further, as shown in FIG. 19, the current using the TFT of the oxide semiconductor in the on state (that is, the electron mobility) is larger than that of the TFT using a-Si. Although the drawing is omitted, specifically, the gate current Id at the gate voltage Vgh (TFT-on) is 1 μA when using the TFT of a-Si, whereas when the TFT of the oxide semiconductor is used, It is about 20~50μA. As described above, it is understood that the TFT using the oxide semiconductor has an electron mobility higher than that of the TFT using a-Si by about 20 to 50 times in the on state, and the conduction characteristics are excellent.

Further, as shown in FIG. 19, the current (i.e., leakage current) of the TFT using the oxide semiconductor in the off state is smaller than that of the TFT using the a-Si or the LTPS. Although the drawing is omitted, specifically, the gate current Id at the gate voltage Vgh (TFT-off) is 10 pA when using the TFT of a-Si, whereas when the TFT of the oxide semiconductor is used, It is about 0.1pA. As described above, it can be understood that the leakage current of the TFT using the oxide semiconductor in the off state is about one percent of the TFT using a-Si, and the leakage current is hardly generated, and the off characteristic is excellent.

As described above, in the display device 2 of the present embodiment, a TFT in which an oxide semiconductor is used for a semiconductor layer is used as a switching element of each pixel, whereby the on-characteristics and off-characteristics of the TFTs of the respective pixels are excellent. Therefore, the electron mobility at the time of writing the pixel data to each pixel is increased, and the time required for the writing can be further shortened.

In other words, since the display device 2 of the present embodiment can perform scanning at a high speed and can shorten the scanning mode period, the period of the pause mode can be sufficiently ensured. Therefore, the accuracy of the detection result of the touch panel 3 can be further improved.

Further, in the present embodiment, the timing controller 7 regenerates the sleep drive control signal and outputs it to the drive circuits 4 and 5. However, it is not necessary to regenerate the sleep drive control signal to the signal line drive circuit 5, but only existing The signal achieves a rest drive. 2 is a timing chart showing an example of a control signal of the scanning line driving circuit 4 and an output signal from the scanning line driving circuit 4. In FIG. 2, the time change of the gate clock signal GCK, the gate output enable signal GOE, and the scan signals G1 to G7 is sequentially displayed from the top.

The gate output enable signal GOE rises after a certain period of time from the fall of the gate clock signal GCK (before the gate clock signal GCK is about to rise), and after a certain period of rise of the gate clock signal GCK Faller. When the gate output enable signal GOE is rising, the current H-level scan signal G falls, and when falling, the next scan signal G rises. That is, when the gate output enable signal GOE is at the H level, all of the scan signals G become the L level, thereby driving the stop.

Therefore, when the sleep mode is reached, the gate clock signal GCK is maintained at the L level, and after the specific period has elapsed, the gate output enable signal GOE is maintained at the H level. As a result, the driving of the scanning signal line G is stopped. From the above, it can be understood that the rest drive can be realized only with the existing signal.

Further, the detection operation of the touch panel 3 is longer than the shortest period required for the operation, and can be performed at any timing if the detection instruction signal is in the H-level period. FIG. 3 is a timing chart showing an example of the detection instruction signal and the detection time of the detection operation by the touch panel 3. In (a) to (c) of FIG. 3, the detection instruction signal is described in the upper stage, and the detection period (H level) of the touch panel 3 is displayed in the lower stage.

In the example of (a) of FIG. 3, the detection indicating signal is in the H level period and is the detection period of the touch panel 3. Moreover, in the example of (b) of FIG. 3, the specific period of the rise time of the distance detection instruction signal is the detection period of the touch panel 3. Furthermore, the specific period may be the same as or shorter than the detection indication signal being the H level period. Further, in the example of (c) of FIG. 3, the detection period of the touch panel 3 is from the time point after the time when the detection signal is raised to the time point before the time when the detection instruction signal is lowered. Therefore, from (a) to (c) of FIG. 3, it can be understood that various changes can be made during the detection period of the touch panel 3.

Further, in the present embodiment, the touch panel 3 having the projection type electrostatic capacitance type is used, but the touch panel 3 of any detection method such as a surface type capacitance method or a resistive film method can be used. Further, in the case of the projection type electrostatic capacitance method, since the detection portion 8 is formed with a plurality of electrode patterns, it is easily affected by the driving of the display panel 2a. therefore, By applying the display device 2 of the present invention to the electronic device 1 including the projection type capacitive touch panel 3, a more remarkable effect can be expected.

[Embodiment 2]

Next, another embodiment of the present invention will be described with reference to Fig. 4 . The electronic device 1 of the present embodiment differs from the electronic device 1 shown in FIG. 1 in that the driving ability of the signal line driving circuit 5 is lowered in the rest mode, and the other configurations are the same. The same components and processes as those described in the above-described embodiments are denoted by the same reference numerals, and their description is omitted.

Fig. 4 is a timing chart showing the operation state of the display device 2 of the present embodiment and the temporal changes of various signals. In FIG. 4, the state of the vertical synchronizing signal, the operation mode, the rest drive control signal, and the driving ability of the signal line drive circuit 5 are sequentially displayed from the top. Further, regarding the state of the above-described driving ability, the H level is a state in which normal driving is performed, and the L level is a state in which the driving is lowered. As the driving ability of the signal line drive circuit 5 is lowered, various types such as stopping of the receiving circuit for receiving the horizontal synchronizing signal or the video signal, stopping the analog amplifier, and reducing the operating speed to half are considered.

Referring to Fig. 4, the signal line drive circuit 5 performs normal driving in the first and second scanning modes, and reduces the driving in the first and second rest modes. Thereby, the display device 2 can reduce the power consumption of the sleep mode. Moreover, since the display device 2 can reduce the occurrence of noise caused by the above-described driving, the accuracy of the detection result of the touch panel 3 can be further improved.

[Embodiment 3]

Next, still another embodiment of the present invention will be described with reference to Fig. 5 . The electronic device 1 of the present embodiment differs from the electronic device 1 shown in FIG. 1 in that the scanning of the display device 2 is interlaced and before the transition from the first resting mode to the second scanning mode. The polarity of the data signal is reversed, while the other components are the same. In addition, the same components and processes as those described in the above embodiments are denoted by the same reference numerals, and are omitted. Slightly explain.

Fig. 5 is a timing chart showing the operation state of the display device 2 of the present embodiment and the temporal changes of various signals. In FIG. 5, the polar sync signal, the operation mode, the sleep drive control signal, the scan signal output to each scanning signal line G, and the polarity of the data signal output to the data signal line S are sequentially displayed from above.

Referring to Fig. 5, first, a falling pulse of a vertical synchronizing signal is input, scanning of one screen is started, and the process shifts to the first scanning mode. At this time, the sleep drive control signal is set to the L level, and the scanning signal lines G1, G3, G5, ... of the odd-numbered lines are sequentially driven to perform one-half scanning of the screen. Furthermore, since the detection instruction signal is at the L level, the touch panel 3 is stopped from detecting.

Second, move to the first rest mode. At this time, the rest drive control signal is set to the H level, and the above scanning is stopped. At the same time, the detection operation is performed on the touch panel 3 by setting the detection instruction signal to the H level.

Next, the polarity of the data signal is inverted immediately before shifting to the second scan mode, and then shifts to the second scan mode. At this time, the sleep drive control signal is set to the L level, and the scanning signal lines G2, G4, and G6, ... of the even-numbered lines are sequentially driven, and the remaining half of the screen is scanned to complete the scanning of one screen. Furthermore, since the detection instruction signal is at the L level, the touch panel 3 is stopped from detecting.

Second, move to the second dormant mode. At this time, the rest drive control signal is set to the H level, and the above scanning is stopped. At the same time, the detection operation is performed on the touch panel 3 by setting the detection instruction signal to the H level. Thereafter, the falling pulse of the vertical synchronizing signal is input again, and the above operation is repeated.

In the case of the display device 2 shown in FIG. 1, since there is a period of the pause mode between the upper scan and the lower scan, it is considered that, for example, scanning of one screen is discontinuous, and the line is visually observed at the boundary between the upper portion and the lower portion. Shows the flaw in quality. On the other hand, in the display device 2 of the present embodiment, since the interlaced scanning is performed, the visual inspection can be eliminated. After the above-mentioned lines, the display quality is suppressed from being lowered.

Further, since the polarity of the data signal is reversed in the next one frame period, it is possible to prevent the image from being caused to appear on the display panel 2a. However, when the polarity of the data signal is reversed immediately after shifting from the first scanning mode to the first rest mode, there is a visual deterioration in display quality such as a luminance gradient. On the other hand, in the display device 2 of the present embodiment, the polarity of the material signal is not inverted until the first scanning mode is shifted to the first rest mode, but is reversed immediately before the transition to the second scanning mode. turn. In other words, since the period until the polarity inversion is increased, the possibility of visually detecting the luminance gradient can be lowered, and the deterioration of display quality can be suppressed.

Here, the reverse driving of the above-described polarity of the display device 2 will be described. The same image is displayed at the same position for a long time, whereby the image electrode of the display panel 2a is preferably one frame period every predetermined number of times (for example, one time), since the image is prevented from being caused on the screen. Reverse the polarity of the voltage. A voltage of the same polarity is applied to the entire pixel electrode of the display panel 2a, and a voltage of a reverse polarity is applied to one frame below the certain frame. The method of repeating this reversal is called "frame inversion". The frame inversion can be realized by inverting the polarity of the voltage applied to all of the data signal lines S in a certain frame every frame period.

Further, in order to prevent flicker, it is preferable to invert the polarity of the voltage for each of the pixel electrodes arranged in at least one of the scanning signal line G direction and the data signal line S direction. The inversion includes "source inversion", "line inversion", and "dot inversion". Hereinafter, the inversion will be described in detail with reference to FIGS. 14 to 17 .

14 to 17 are views showing the configuration of the scanning signal line G, the data signal line S, and the pixel electrode of the display panel 2a. Further, with respect to each of FIGS. 14 to 17, (a) shows the voltage polarity of each pixel electrode of a certain frame (nth frame), and (b) shows that the reverse polarity is applied to the next frame (n+1th frame). The polarity of the voltage of each pixel electrode of the voltage. The voltage polarity of each pixel electrode is represented by positive (+) and negative (-) in the figure.

Figure 14 shows an example of source reversal. Source reversal to invert to each data signal line (Source line) The polarity of the voltage applied by S. Thereby, as shown in FIG. 14, the polarity of the voltage can be inverted for each of the pixel electrodes arranged in the direction of the scanning signal line G.

Fig. 15 shows the same source reversal as Fig. 14, but the arrangement of the pixel electrodes is different from that of Fig. 14. In Fig. 14, the pixel electrode connected to the data signal line S is disposed on one side (the right side in the illustrated example) with respect to the data signal line S. On the other hand, in FIG. 15, the pixel electrode connected to the data signal line S is arranged in a zigzag shape with respect to the data signal line S. Therefore, the voltage polarities of the pixel electrodes disposed between the adjacent data signal lines S are the same in the configuration of FIG. 14, and are different from each other in the configuration of FIG.

Fig. 16 shows an example of line inversion. The line inversion is such that the polarity of the voltage applied to the data signal line S is inverted for each of the driven scanning signal lines G (per horizontal scanning period). Thereby, as shown in FIG. 14, the polarity of the voltage can be inverted for each of the pixel electrodes arranged in the direction of the data signal line S.

Figure 17 shows an example of dot inversion. The dot inversion can be realized by combining the source inversion shown in Fig. 14 with the line inversion shown in Fig. 16. Specifically, when the first scanning signal line G1 is driven, the polarity of the voltage applied to each of the data signal lines S is set to positive (+) in the first strip, and the following is reversed in order. Next, when the second scanning signal line G2 is driven, the polarity of the voltage applied to each of the data signal lines S is set to be negative (-) in the first strip, and the following is reversed in order. Further, when the scanning signal line G after the third step is driven, the same is repeated, whereby the voltage polarity of the pixel electrodes adjacent to each other in the scanning signal line G direction and the data signal line S direction can be made as shown in FIG. different.

However, in the case of the display device 2 of the present embodiment, as shown in FIG. 5, the polarity of the voltage applied to the data signal line S is reversed between the first scanning mode and the second scanning mode while performing interlaced scanning. Thereby, the line inversion as shown in FIG. 16 can be achieved. As a result, the line inversion can be realized while suppressing the power consumption as compared with the case where the polarity of the voltage is inverted for each of the scanning signal lines G that are driven. Further, in the present embodiment, the interlaced scanning is performed every other scanning signal line G, but the scanning signal line G may be scanned every other number of times. Interlace scanning.

[Embodiment 4]

Next, still another embodiment of the present invention will be described with reference to Fig. 6 . The electronic device 1 of the present embodiment differs from the electronic device 1 shown in FIG. 1 in that one screen scan is performed in three scan modes and three pause modes, and before the pause mode is shifted to the scan mode. The polarity of the data signal is reversed, while the other components are identical. The same components and processes as those described in the above-described embodiments are denoted by the same reference numerals, and their description is omitted.

Fig. 6 is a timing chart showing the operation state of the display device 2 of the present embodiment and the temporal changes of various signals. In FIG. 6, the vertical synchronizing signal, the operation mode, the rest drive control signal, the scan signal output to each scanning signal line G, and the polarity of the data signal output to the data signal line S are sequentially displayed from above.

Referring to Fig. 6, the falling pulse of the vertical synchronizing signal is first input, and scanning of one screen is started. Next, the polarity of the data signal is inverted immediately before shifting to the first scan mode, and then shifts to the first scan mode. At this time, the rest drive control signal is set to the L level, and the upper scanning signal lines G1 to G6 are sequentially driven to scan the upper portion of the screen. Furthermore, since the detection instruction signal is at the L level, the touch panel 3 is stopped from detecting.

Second, move to the first rest mode. At this time, the rest drive control signal is set to the H level, and the above scanning is stopped. At the same time, the detection operation is performed on the touch panel 3 by setting the detection instruction signal to the H level.

Next, the polarity of the data signal is inverted immediately before shifting to the second scan mode, and then shifts to the second scan mode. At this time, the rest drive control signal is set to the L level, and the scanning signal lines G7 to G12 in the middle are sequentially driven to perform scanning in the middle of the screen. Furthermore, since the detection instruction signal is at the L level, the touch panel 3 is stopped from detecting.

Second, move to the second dormant mode. At this time, the rest drive control signal is set to the H level, and the above scanning is stopped. At the same time, by making the detection indication signal H level, on the touch surface The board 3 performs the action of detecting.

Next, the polarity of the data signal is inverted immediately before shifting to the third scan mode, and then shifts to the third scan mode. At this time, the rest drive control signal is set to the L level, and the lower scanning signal lines G13 to G18 are sequentially driven to scan the lower portion of the screen to complete the scanning of one screen. Furthermore, since the detection instruction signal is at the L level, the touch panel 3 is stopped from detecting.

Second, move to the third rest mode. At this time, the rest drive control signal is set to the H level, and the above scanning is stopped. At the same time, the detection operation is performed on the touch panel 3 by setting the detection instruction signal to the H level. Thereafter, the falling pulse of the vertical synchronizing signal is input again, and the above operation is repeated.

As described above, in the display device 2 of the present embodiment, the above-described effects of the present invention can be exhibited even if the number of times of the scanning mode and the rest mode in one frame period is three or more.

Further, since the polarity of the material signal is reversed during the next one frame period, it is possible to prevent the image from being caused to appear on the display panel 2a. Furthermore, the polarity of the data signal is not reversed from the scan mode until the transition to the rest mode, but is reversed just before transitioning to the next scan mode. That is, since the time until the polarity is reversed is increased, the possibility of visually detecting the above-described luminance gradient is lowered, and the deterioration of display quality can be suppressed.

[Embodiment 5]

Next, another embodiment of the present invention will be described with reference to Figs. 7 and 8 . The electronic device 1 of the present embodiment differs from the electronic device 1 shown in FIG. 1 in that the timing controller 7 can switch between the normal scanning timing signals for scanning one screen by the one-shot scanning mode and the one-times pause mode. The output is the same as the output of the multi-scan timing signal for one-screen scanning by the two-scan mode and the two-times pause mode. The same components and processes as those described in the above-described embodiments are denoted by the same reference numerals, and their description is omitted.

Fig. 7 is a view showing the schematic configuration of the timing controller 7 of the display device 2 of the present embodiment. Block diagram. As shown in FIG. 7, the timing controller 7 is configured to include a normal scanning timing generating circuit (normal scanning driving mechanism 70), a complex scanning timing generating circuit (multiple scanning driving mechanism) 71, and a selection unit (selection mechanism). ) 72.

The scanning timing generation circuit 70 generates a pause driving control signal and a detection instruction signal by scanning one screen (hereinafter referred to as "normal scanning") in one scanning mode and one pause mode. Further, the complex scanning timing generation circuit 71 generates a pause driving control signal and a detection instruction signal by performing one-screen scanning (hereinafter referred to as "complex scanning") by the secondary scanning mode and the secondary suspension mode. .

The selection unit 72 selects one of the normal scan timing generation circuit 70 and the complex scan timing generation circuit 71 based on a predetermined condition. The selection unit 72 acquires the sleep drive control signal and the detection instruction signal from the selected circuit, and outputs the same to the drive circuits 5 and 6 and the touch panel 3, respectively.

The above-described predetermined conditions of the selection unit 72 are various. For example, consider performing normal scanning and complex scanning alternately every frame period. In this case, the number of times the touch panel 3 performs the detecting operation in one second is 60 times × 1.5 = 90 times.

Further, it is considered that the complex scan is performed for one frame period of a specific number of times within one second, and the normal scan is performed for the remaining one frame period. For example, if the plurality of scans are performed during the first 40 frames and the normal scan is performed during the remaining 20 frames, the number of times the touch panel 3 performs the detection operation within 1 second is 40 times × 2 + 20 times. =100 times.

Fig. 8 is a timing chart showing the operation state of the display device 2 of the present embodiment and the temporal changes of various signals. In Fig. 8, the vertical synchronizing signal, the operation mode, and the rest drive control signal are sequentially displayed from the top.

Fig. 8 shows an example in which normal scanning and complex scanning are alternately performed every one frame period. Furthermore, the total value of the period of the scanning mode of the normal scanning and the scanning mode of the complex scanning may be different or the same in one frame period.

Furthermore, in the above embodiment, the selection unit 72 performs based on predetermined conditions. Selection, but may also be based on an indication from the body device 10. In this case, the number of detections of the touch panel 3 can be increased by the timing required by the main device 10.

[Variation 1]

Hereinafter, a modification of the electronic device 1 of the present embodiment will be described with reference to Figs. 10 and 11 .

(electronic machine 1')

Fig. 10 is a block diagram showing the details of the configuration of the electronic device 1' of the embodiment. The difference between the electronic device 1 and the electronic device 1' is the path for detecting the indication signal.

As described above, the electronic device 1 of FIG. 9 directly outputs the detection instruction signal from the timing controller 7 of the display device 2 to the control unit 9 of the touch panel 3.

On the other hand, the electronic device 1' of FIG. 10 outputs a detection instruction signal from the timing controller 7 of the display device 2 to the control unit 9 of the touch panel 3 via the main body device 10.

Specifically, the timing controller 7 of the display device 2 outputs the first detection instruction signal (arrow H1) to the main body device 10. Then, the main device 10 that receives the first detection instruction signal outputs a second detection instruction signal (arrow H2) whose timing is substantially equal to the first detection instruction signal to the control unit 9 of the touch panel 3.

The situation in which the detection indication signal is outputted by the path shown in the electronic device 1' of FIG. 10 causes a degree of delay through the body device 10. Further, when the first detection instruction signal is subjected to signal processing such as inverting the signal level, a delay is caused by the signal processing.

Such a delay, that is, a delay caused by the main unit 10 or a delay caused by signal processing of the main unit 10 causes a delay time Tdelay between the first detection instruction signal and the second detection instruction signal.

Therefore, the configuration of the electronic device 1' of FIG. 10 can be set, for example, as shown in FIG. 11, and each detection instruction signal is output in consideration of the delay time Tdelay. In other words, the configuration of the timing controller 7 can be, for example, outputting the first detection instruction signal (arrow H1) to the main body device 10 or the like from the start time delay time Tdelay of the touch panel detection time Ttp.

The main device 10 that receives the first detection instruction signal applies the signal processing to the first detection instruction signal as needed, generates a second detection instruction signal, and outputs the second detection instruction signal to the control unit 9 of the touch panel 3.

Thereby, the time from the time when the first detection instruction signal is output to the delay time Tdelay can be set as the start time of the touch panel detection time Ttp.

(display panel 2a)

The display panel 2a of the present embodiment may be a liquid crystal panel having a liquid crystal layer. In this case, the display device 2 of the present embodiment is a liquid crystal display device.

Further, the pixel of the display panel 2a of the present embodiment may have an organic EL (Electro Luminescence) diode that emits light in accordance with the luminance of the flowing current. In this case, the display device 2 of the present embodiment is an organic EL display (organic electroluminescence display device).

The organic EL display consumes a large amount of power in the scanning mode and increases the influence of the driving signal of the organic EL display on the detecting device. Therefore, when the present invention is applied to the organic EL display, the effect can be more exerted.

[Variation 2]

Fig. 18 is an explanatory view showing a configuration of a modification of the display device 2 shown in Fig. 9. In the display device 2 of FIG. 9, the timing controller 7 outputs a detection instruction signal (arrow H) having the same timing as the rest drive control signal to the control unit 9 of the touch panel 3.

Here, in the display device 2 of FIG. 9, the timing controller 7 outputs a video signal (a clock signal, a sync signal, a video data signal, etc.) to a signal line drive circuit 5 to output a synchronous control signal (source start pulse signal). Before the source latch strobe signal, source clock signal, etc., it will generate several clock pulses ~ several line scan delays. The reason for this is that time generation or image processing inside the timing controller 7 takes time.

On the other hand, as shown in FIG. 18, the display device 2 may include a gate driving portion 4' corresponding to the number of scanning signal lines G (in the illustrated example, 2) )).

Further, as shown in FIG. 18, the signal line drive circuit 5 may be provided with a number of source drive units 5' corresponding to the number of data signal lines S (signal line drive unit, detection instruction means, and illustration) In the case of three).

The source driving sections 5' recognize the timings of the scanning mode and the rest mode more accurately than the timing controller 7 in such a manner that the above-described delay does not exist.

Therefore, as shown in FIG. 18, the detection instruction signal can be output to the control unit 9 of the touch panel 3 via the connection terminal 20 from one of the source drive units 5'. Thereby, since the influence of the delay when the detection instruction signal is output from the timing controller 7 to the detection unit control unit 9 can be removed, the period of the pause mode of the display device 2 can be more accurately transmitted to the detection device 3, thereby making it possible to The detection operation of the detecting unit 8 of the touch panel 3 is correctly controlled.

Here, in each of the above embodiments, the touch panel detection period may be such that the start time and the end time of the touch panel detection period are valid during the detection instruction signal.

The present invention is not limited to the embodiments, and various modifications can be made without departing from the scope of the invention, and the embodiments obtained by appropriately combining the technical means disclosed in the respective embodiments are also included in the technical scope of the present invention. Inside.

For example, in the above embodiment, the detection instruction signal is output from the timing controller 7 to the touch panel 3. On the other hand, since the sleep drive control signal corresponding to the detection instruction signal is output from the timing controller 7 to the scanning line drive circuit 4, the scanning line drive circuit 4 can also transmit the detection instruction signal to the touch panel 3.

Further, in the above embodiment, the touch panel 3 is used, but the present invention is also applicable to any inspection apparatus. As an example of the detecting device, in addition to the touch panel 3, an RF (Radio Frequency) receiving circuit that receives (detects) radio waves from an external device can be cited. The RF receiving circuit is also affected by EMI (Electro Magnetic Interference) radiated from the display device when receiving radio waves. Therefore, on display When the device is in the rest mode, the RF receiving circuit performs a radio wave reception (detection) operation, thereby improving the accuracy of the received signal.

As described above, the display device of the present invention is characterized in that it is provided with a display element for displaying an image on a screen, and a driving mechanism for driving the display element in a scanning mode in which scanning is alternately repeated and a pause mode in which the scanning is suspended. In order to solve the above problem, the driving mechanism can drive the display element by scanning one screen by using a plurality of scanning modes and a plurality of pause modes, and outputting to the external detecting device in the rest mode. A detection indication signal indicating the detection.

Further, the driving method of the display device according to the present invention is characterized in that the display element for displaying an image on the screen is driven in such a manner that the scanning mode of the scanning is alternately repeated and the mode of stopping the scanning is stopped, in order to solve the above problem, The display element is driven to scan one screen by a plurality of scan modes and a plurality of pause modes, and in the sleep mode, an external detection means outputs a detection instruction signal for instructing detection.

According to the above configuration and method, one screen scan can be performed by the plurality of scan modes and the plurality of pause modes. Therefore, the number of times of the above-described rest mode can be increased as compared with the previous display device which performs scanning of one screen by one scanning mode and one pause mode.

Further, in the above-described rest mode, the detecting device performs an operation of detecting by outputting the detection instruction signal to the external detecting device. Thereby, the aforementioned detecting device can improve the accuracy of the aforementioned detection result. Further, as described above, since the number of times of the rest mode can be increased, the number of times of the above-described detection operation can be increased. As a result, for example, it can correspond to the aforementioned handwriting input.

In the display device according to an aspect of the present invention, in the sleep mode, the driving means preferably reduces or stops the operation of the circuit in the display device or reduces the capacity of the circuit. In this case, the power consumption in the idle mode can be reduced. Also, because it can be reduced before Since the noise caused by the driving is generated, the accuracy of the detection result of the detecting device can be further improved.

As the display element, a matrix display element including a plurality of pixel electrodes arranged in a matrix is exemplified.

In the display device of one aspect of the invention, the scanning may also be interlaced scanning. In this case, since the entire screen is scanned in a general manner, the deterioration of the display quality can be suppressed as compared with the case where the scanning of one portion of the screen is performed with time. Furthermore, the interlaced scan may be an interlaced scan every other line or an interlaced scan every other line.

However, in the display device, there is a display device that drives the display element such that the polarity of the voltage applied to the pixel electrode is reversed during the scanning of one screen. In this case, the influence of the driving signal of the display device on the detecting device is increased. Therefore, if the present invention is applied to the display device, the effect can be more exerted.

In the display device according to an aspect of the invention, the driving means may drive the display element such that the polarity of the voltage applied to the pixel electrode is reversed immediately before the pause mode is shifted to the scanning mode. In this case, compared with the case where the polarity of the signal of the image is reversed immediately after shifting from the scanning mode to the rest mode, and the input to the display element is performed, the display quality such as the generation of the luminance gradient can be suppressed. The decline.

In a display device according to an aspect of the present invention, the display device further includes a plurality of data signal lines and a plurality of scanning signal lines for driving the pixel electrodes, and the driving mechanism includes driving the data signal lines and the scanning signal lines respectively. The data driving circuit and the scan driving circuit, wherein the detection instruction signal is output to any one of the data driving circuit and the scanning driving circuit.

Since the data driving circuit and the scanning driving circuit are circuits that drive the display element in the near future, the timing of driving the display element is more accurately grasped. In other words, the period of the rest mode can be closely grasped. Therefore, the driving circuit and the scanning drive can be driven from the above data. Any one of the dynamic circuits outputs the detection instruction signal, and the detection operation of the detection device is actually performed during the rest mode.

In the display device according to an aspect of the present invention, the drive mechanism preferably includes a normal scanning drive mechanism that drives the display element by scanning one screen in one scan mode and one pause mode. a plurality of scanning drive mechanisms for driving the display element by scanning one screen by a plurality of scanning modes and a plurality of pause modes; and a selecting mechanism for selecting a normal scanning driving mechanism and a plurality of scanning driving mechanisms Any of them.

For example, the selection means sets a ratio of a period during which the normal scanning drive mechanism is selected and a time period of selecting the plurality of scanning drive mechanisms, and selects a normal scanning drive mechanism and a plurality of scanning drive mechanisms based on the ratio. Either.

Further, the selection means is configured to set one of the number of times of selecting the normal scanning drive mechanism and the number of times of selecting the plurality of scanning drive mechanisms in a specific time in advance in a predetermined time period, and based on the number of times, select a normal one. Any one of a scanning drive mechanism and a plurality of scanning drive mechanisms.

In such a case, the number of times of the rest mode in a certain period of time, that is, the number of times of the above-described detection operation within a certain time period, can be set to a desired number of times.

Further, as an example, the selection means selects one of a normal scanning drive mechanism and a plurality of scanning drive mechanisms based on an instruction from an external device. In this case, the number of times of the above detection operation can be increased by the timing of the external device.

Further, examples of the display device include a liquid crystal display device, an organic electroluminescence (EL) display device, and the like. The organic EL display device consumes a large amount of power in the scanning mode, and the influence of the driving signal of the display device on the detecting device increases. Therefore, if the present invention is applied to the display device, the effect can be more exerted.

In a display device according to an aspect of the present invention, the display element includes a plurality of pixels and a plurality of switching elements disposed in each of the plurality of pixels, the switching element being A preferred semiconductor layer is a TFT using an oxide semiconductor.

As the switching element of each pixel, a TFT using an oxide semiconductor having a relatively high electron mobility is used for the semiconductor layer, whereby the electron mobility at the time of writing pixel data to each pixel can be increased, and the writing can be shortened. The time spent. Thereby, since scanning can be performed at a very high speed, the period of the scanning mode can be shortened, and the period of the pause mode can be sufficiently ensured. Therefore, the accuracy of the detection result of the aforementioned detecting device can be further improved. Further, as the oxide semiconductor, it is preferable to use IGZO having a higher electron mobility.

Further, in the case of the electronic device having the display device having the above configuration and the detecting device for detecting based on the detection instruction signal from the display device, the same effects as those described above can be exhibited.

Further, examples of the detecting device include a touch panel provided on a screen of the display device, and an RF receiving device that detects a radio wave and receives a signal included in the radio wave.

Since the touch panel is close to the display device, the influence of the driving signal of the display device is large. Therefore, if the touch panel is used as the above-described detecting device, the present invention can exert an effect more.

Further, the RF receiving device is susceptible to EMI (electromagnetic interference) radiated from the display device due to the driving signal of the display device. Therefore, the present invention is more effective in that an RF receiving device is used as the detecting device.

[Industrial availability]

As described above, since the display device of the present invention can scan one screen by the plurality of scanning modes and the plurality of pause modes, in the above-described rest mode, the detection instruction signal is output to the external detecting device, so that the display device can be added. The number of detection operations of the detection device is improved, and since the accuracy of the detection result can be improved, it can be applied to any display device that performs scanning.

Claims (14)

An electronic device characterized by comprising a display device and a touch panel; wherein the display device comprises a display element for displaying an image on a screen, and driving in a scanning mode in which the scanning is alternately repeated and a pause mode in which the scanning is suspended. a driving mechanism of the display device; the driving mechanism can drive the display device by scanning a screen by using a plurality of scanning modes and a plurality of pause modes; and detecting the output of the touch panel in the rest mode An indication signal indicating detection of an input to the touch panel; the display element comprises a matrix type display element of a plurality of pixel electrodes arranged in a matrix; the display element further comprising a plurality of data for driving the pixel electrode a signal line and a plurality of scanning signal lines; and the driving mechanism includes a data driving circuit and a scanning driving circuit for respectively driving the data signal line and the scanning signal line; and the detection indication signal is detected during the scanning of the one screen The plural of the input of the above touch panel Red; the touch panel based signal indicative of the detection, to detect the input from the touch panel based on the display device. The electronic device of claim 1, wherein the driving mechanism reduces or stops the operation of the circuit in the display device or disables the circuit in the rest mode. The electronic machine of claim 1 or 2, wherein the aforementioned scan is an interlaced scan. The electronic device of claim 1 or 2, wherein the driving mechanism comprises: a general scanning driving mechanism, which adopts one scanning mode and one pause mode Driving the one display screen to drive the display element; the plurality of scanning drive mechanisms driving the display element by scanning one screen by the plurality of scanning modes and the plurality of pause modes; and selecting a mechanism Any one of a normal scanning drive mechanism or a plurality of scanning drive mechanisms is selected. The electronic device according to claim 4, wherein the selection means presets a ratio of a period during which the normal scanning drive mechanism is selected to a period in which the plurality of scanning drive mechanisms are selected, and based on the ratio, selects a normal scanning drive mechanism or a plurality of scans. Use any of the drive mechanisms. The electronic device of claim 4, wherein the selection means is preset based on any one of selecting the number of times of the normal scanning drive mechanism in a specific time or the number of times of selecting the plurality of scanning drive mechanisms in a specific time period, and based on For this number of times, one of the normal scanning drive mechanism or the plurality of scanning drive mechanisms is selected. The electronic device of claim 4, wherein the selection means selects either a normal scanning drive mechanism or a plurality of scanning drive mechanisms based on an instruction from the external device. The electronic device of claim 1 or 2, wherein the display device is a liquid crystal display device. The electronic device of claim 8, wherein the driving means drives the display element such that a polarity of a voltage applied to the pixel electrode is reversed during scanning of one screen. An electronic device according to claim 8, wherein said driving means drives said display element such that a polarity of a voltage applied to said pixel electrode is reversed immediately before shifting from said rest mode to said scanning mode. The electronic device of claim 1 or 2, wherein the aforementioned display device is an organic electroluminescence display device. The electronic device of claim 1 or 2, wherein the display element comprises a plurality of pixels, And a plurality of switching elements provided in each of the plurality of pixels, wherein the switching element is a TFT using an oxide semiconductor in the semiconductor layer. The electronic device of claim 12, wherein the oxide semiconductor is IGZO. A timing control method for an electronic device, comprising: a display device and a touch panel; wherein the display device drives the display element for displaying an image on the screen in a scanning mode in which the scanning is alternately repeated and a pause mode in which the scanning is suspended. And driving the one-screen scanning by the plurality of scanning modes and the plurality of pause modes; wherein the display device drives the plurality of pixel electrodes arranged in a matrix included in the display element in the sleep mode And detecting, by the touch panel, a detection indication signal indicating the detection of the input to the touch panel; the touch panel detecting the input to the touch panel based on the detection indication signal from the display device; the detection indication The signal has a plurality of pulses that detect the input to the touch panel during the scanning of the one screen.